Frostproof drain valve



30 l Aug 927 A. L. wERTz Y FROSTPROOF DRAIN VALVE Filed Dec. 28,` 19125I i about the walls of the tanks an valves freezes and causes considerable dim- I porates a locking densation in mama aug. 3a-i921.

. UNITED STATES PATENT-orifice..

LAKEWOOD, OHIO, A.LSSIGIIOB Oil' ONE-HALF T0 03m G.

BOSENI'ELD, 0F CLEVELAND, OHIO.

:rnos'rrnoor DRAIN v'sLvii.

applicativa nea m'lmm as; ma semi so. was?.

This invention relates-to a drain valve that is especially adapted for use with large outdoor storage ltanks for containing oils and other liquids. f

It is a well known fact that during the fall and earl winter, when the temperature drops consi erably below that prevailing during the preceding summer months, there is quite an accumulation of water'of conthe bottoms of tanks of the above mentioned class, and, later, "as the temperature drops below freezin the `water within the culty in draining or drawing of the oil from the tanks, torches usually having to be resorted to to thaw out the valves before the ltanks can be drained or the oil drawn of. This is not .only a time consuming an troublesome operation, but the use of the torch in such close roximity to .the combustible contents of e tanks is hazardous.

The primary purpose of my invention .is 'g provide a so-called frost-proof drain to to valve for tanks of the class abovereferred whichis immune' from freezing so that, at

any time, the ,tank may be drained by the simple operation of the valve.

Other objects are to provide Aa comparatively simple and substantial construction that is durable andhighly eicient; that is vconvenient of manipulation and that incorshroud which, whenin rotecting position, encloses the stuing g and andthe valve stem and mtectsithem from being tampered with, said shroud being designed for use as a means for operating the valve when it is removed and its positionreversed. The foregoing objects are attained in the embodiment of the invention illustrated in the accompanying drawing wherein Fig. 1 shows a longitudinal sectional view through 'the valve and4 the adjacent lportion of a tank to which the valve is app ed; and Fig. 2 is a frontend view of the valve.

The valve is comprisedofa relatively long hollow casing 1 which terminates at one `end in avalveseat 2 and at the other is formedwithabosshavingaborethatis in axial alignment with the valve seat 2. The inner end of said bore is provided with a square thread for cooperation with a corresponding thread on -a valve stem 5 which carries, as its inner end, a valve disk or body c mentioned square threads wherewith the threads of the thebore of the boss 3 extension 18 of the casing 6 that is designed to enga the stem is rotated in a cection to feed it forwardly through the medium of its before# thi-cad. Outwardly beyond the valve stem cooperate, is enlarged and internally threaded to provide a stuffing gland 7 of usual form and involving the sleeve nut 8. While the valve stem 5, inwardly of its threaded portion,

is strengthened by longitudinal ribs 9 that merge with the valve iskv or body 6, it is cylindrical forwardly of said threads and, at its extreme outer end is reduced in diameter, a part adjacent said reduced end being squared or otherwise formedas shown at 10, for the receptionof a wrench or other valve operatin tool: To prevent the stem d from being fe inwardly 'too far, a stop pin 12 is passed through the stem immediately inwar ly for engagement with the nut 8 o land, l

Designed to fit over the outwardly extendmg portion of the boss 3 is a locking shroud 15 which has a laterally extending perforated ear 16 that may be arranged in proxto `a similar ear 17 projecting fory from the internally threaded outlet 1. The shroud 15 may be secured against withdrawal from the boss3 by a pad lock 19 whose bow is adapted to be engaged throu h the rforations of the ears 16 and 17. e re uced outer end of the shroud 15 has a socket 20 of a size and shape to fit upon the wrench receiving portion 10 of the valve stem. When it is desired to'operate the valve the lock 19 is removed, the shroud is withdrawn and reversed and its socket 20`is engaged over the portion 10 of the stem. When 1n tion, the shroud may be effectively employed as a wrench for operating the valve.v

The casing 1 is provided with an external thread 25 that is spaced a material distance outwardly from the region of the valvey 6, This thread provides means by which the valve may be attached to a tank wall. In 1,thethread25isshownasscrewed into a a 26 on the outer side of the wal-1 27 of a ta the valveoccupying a position as close as practicable to the tank bottom 28.

When so installed, the valve seat 2 and. body or disk 6 are inwardly of the wall 27 a distance suicient to insure against the seat 2 when i of the wrench tportion 10 e stulling this posithe water which surrounds these parts freezing, for it is a fact that the water freezes l only a comparatively short distance inwardly of the wall. Consequently, when the valve is first opened, any water that has accumu- 'lated in the bottom of the tank may flow out; and inasmuch as the valve and its seat -ing a relatively long caslng having `a through passageway that opens at its outer end through a side of the casing, the inner end of the casing being formed to provide a valve seat While its outer end is rovided with a boss that is in substantially `axial alignment with the valve seat, the boss hav` ing a bore the inner portion of which is threaded while the outer portion is enlarged to provide a packing gland cavity, a compression member operating within said cav.

ity, a valve stem extending axiall through the casing and through thebore o said boss and havin threads for cooperation with the threads o said bore, the ,outer end of said stem being designed for the application of an operating device, a valve body carriedby the inner end of the-stein for cooperation with the valve seat, a shroud removably fitted over the outer end of' the aforesaid boss and enclosing the protruding end of the valve stem, said shroud being reversible and being designed, when in reversed osition, to be applied to the outer end ot the valve stem' for rotatinr it, the shroud and casing having parts adapted to be brought into register for the application of a lock, the casing incorporating means remote from its innery end for attachlng it to the Wall of a container so that the valve seat Will be spaced a material distance inwardly of said wall, as and for the purpose specified.

In testimony whereof, I hereunto affix my AUSTINA L. WERTZ.

' signature. 

